EP1248384B1 - Procede de contrôle de la puissance d'émission - Google Patents

Procede de contrôle de la puissance d'émission Download PDF

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Publication number
EP1248384B1
EP1248384B1 EP01107740A EP01107740A EP1248384B1 EP 1248384 B1 EP1248384 B1 EP 1248384B1 EP 01107740 A EP01107740 A EP 01107740A EP 01107740 A EP01107740 A EP 01107740A EP 1248384 B1 EP1248384 B1 EP 1248384B1
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EP
European Patent Office
Prior art keywords
power
transmission
amplifier
span
information item
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01107740A
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German (de)
English (en)
French (fr)
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EP1248384A1 (fr
Inventor
Philippe Gouessant
Thierry Arnaud
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STMicroelectronics NV
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STMicroelectronics NV
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Publication date
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Priority to EP01107740A priority Critical patent/EP1248384B1/fr
Priority to DE60130099T priority patent/DE60130099T2/de
Priority to JP2002071440A priority patent/JP2002330079A/ja
Priority to US10/113,958 priority patent/US7096035B2/en
Publication of EP1248384A1 publication Critical patent/EP1248384A1/fr
Application granted granted Critical
Publication of EP1248384B1 publication Critical patent/EP1248384B1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/44—TPC being performed in particular situations in connection with interruption of transmission

Definitions

  • the invention relates generally to wireless communication systems, in particular those intended to operate according to the UMTS standard.
  • a base station communicates with a plurality of remote terminals, such as cellular mobile phones.
  • Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA) are the traditional multiple access schemes for deliver simultaneous services to a number of terminals.
  • FDMA and TDMA systems The basic idea underlying FDMA and TDMA systems is to share the available resource, respectively at several frequencies or time intervals, so that multiple terminals can operate simultaneously without causing interference.
  • GSM-based telephones belong to the FDMA and TDMA systems in that transmission and reception take place at different frequencies and also at different time intervals.
  • CDMA Code Division Multiple Access
  • CDMA systems allow multiple users to share a common frequency and a common time channel using coded modulation.
  • CDMA systems include CDMA 2000, WCDMA (Wide Band CDMA), or IS-95.
  • a scrambling code English language is associated with each base station and makes it possible to distinguish one base station from another.
  • an orthogonal code known to those skilled in the art under the name "OVSF Code” is allocated to each remote terminal (such as for example a cellular mobile telephone). All OVSF codes are orthogonal to each other, which distinguishes one remote terminal from another.
  • the signal Before transmitting a signal on the transmission channel to a remote terminal, the signal has been scrambled and spread (spread in English) by the base station using the scrambling code of the radio station. base and the OVSF code of the remote terminal.
  • CDMA-FDD frequency division duplex
  • CDMA-TDD time domains for the transmission and reception
  • the invention is advantageously applicable to communication systems of the CDMA type, and more particularly to systems of the CDMA-FDD type.
  • the invention also applies to communication systems of the FDMA and TDMA type, in particular to GSM and GPRS telephones, and more generally to terminals operating according to the UMTS standard which must be able for example to function both under a CDMA system, like the WCDMA system and under a FDMA and TDMA system.
  • the transmission power delivered by the power amplifier can vary within a predetermined power range, typically from -50 dBm to 24 dBm for third generation mobile phones. In this power range, the transmit power is adjusted according to power information regularly received by the telephone and from the base station.
  • the power amplifier is designed to have the greatest efficiency for maximum transmit power.
  • the intermediate or low powers there is a significant deterioration of the efficiency since the quiescent current of the power amplifier does not change, while the power emitted decreases.
  • the efficiency that is to say, the yield, drastically decreases to values less than one percent.
  • the invention aims to provide a solution to this problem.
  • An object of the invention is to control the transmission power of a remote terminal, in particular a cellular mobile telephone, so as to optimize its efficiency without affecting the quality of the service transmitted and without notably causing distortion of the signal.
  • the invention therefore proposes a method for controlling the transmission power of a remote terminal of a wireless communication system, for example a cellular mobile telephone, in a predetermined power range, in which process the power is adjusted. transmission based on power information (setpoints) received by the phone.
  • a wireless communication system for example a cellular mobile telephone
  • the telephone is equipped with a variable gain amplification means capable of covering said power range, and the value of the gain and of the supply voltage of the amplification means is regulated. function of said power information.
  • the invention thus makes it possible to adjust, on the one hand, the gain of the amplification means as a function of the power demanded so as to limit as far as possible any heat dissipation of power.
  • one of the parameters of an amplifier is the decline relative to its saturation point (better known by the skilled person under its English name of "back-off").
  • a change in the gain of the amplifier and consequently a change in its power output causes a change in the back-off which can in some cases become too low increasing the risk of non-linear operation of the amplifier ( signal distortion).
  • the invention also adjusting the value of the supply voltage of the amplification means is to obtain an optimum back-off.
  • variable gain amplification means from at least two individually selectable power amplifiers capable of covering the entire power range together, and respectively having two different specific operating areas and a common operating area. And, the selection of one or the other of these two amplifiers functionally leads to a variation of the gain of the amplifier stage.
  • one of the amplifiers is associated with each point of the power range according to a predetermined allocation criterion.
  • This award criterion is preferably an efficiency criterion.
  • one or the other of the amplifiers can be selected just before the This being the case, as will be seen in more detail below, such an efficiency criterion can be modulated, for example in WCDMA systems to provide for a switching of the amplifiers with a lesser perturbation for the first time. the transmission of data. This can then lead to associate certain points of the common area to the amplifier that has the greatest efficiency and to associate certain other points of the common area amplifier that does not have the greatest efficiency.
  • At least one of the amplifiers can be variable gain. And, besides selecting one of these amplifiers, the value of the selected amplifier gain is advantageously adjusted according to the power information.
  • the power amplifier is continuously in operation during communications since there is no notion of time sharing. Also, it is appropriate in this case, when also using two power amplifiers individually selectable and able to cover together the entire range of power, of choose the switching instant that will cause a minimal disruption in the transmission.
  • a switching time range extending from the instant of reception of said power information is defined for a predetermined duration compatible with the limits of said common zone. Also defined according to a predetermined criterion of transmission interruption, the time limits of an interrupt time range being in said switching range.
  • the switching point can be flexibly selected in a time range (switching range). ) corresponding to the limits of the common area of operation. And, within this range of switching, the invention provides to choose the switching time that will cause a minimum disturbance in the transmission.
  • At least one of the amplifiers is variable gain. And, in addition to adjusting the supply voltage according to the power information, the gain value of the selected amplifier will also be adjusted according to the power information.
  • the information transmitted is formed of "fragments" ("chips" in English language) and are conveyed within successive frames each subdivided into a predetermined number of slots ("slots" in English).
  • the duration of the switching range is then advantageously of the order of a few intervals, for example four to eight intervals.
  • the duration of the interruption time range is advantageously of the order of a few fragments, for example two to four fragments.
  • the emission interruption criterion comprises the choice of at least one predetermined particular event that may occur during a transmission and having a predetermined impact on the transmission rate.
  • BER Binary Error Rate
  • the characteristics of the emission are then analyzed so as to detect the possible presence of this particular predetermined event within the switching range. And, if this presence is effective, said time range of interruption is placed at the occurrence of this particular event.
  • the interruption of the transmission to allow switching of the amplifiers will have the desired predetermined impact on the emission, in practice a negligible impact.
  • the emission interruption criterion comprises the choice of a group of several predetermined particular events that may occur during a transmission, and the scheduling of these particular events according to a predetermined order of priority according to their respective impacts on the bit error rate in case of emission interruption at the occurrence of these particular events.
  • the particular event having the highest priority will correspond to the one for which the impact on the bit error rate will be the lowest if the interruption of the emission occurs during the occurrence of this particular event.
  • the particular event that will then be assigned the lowest priority will be the one with the highest impact on the bit error rate, if the interruption occurs during this particular event.
  • the characteristics of the transmission are then advantageously analyzed by considering said priority order, so as to detect the possible presence during said switching range of a particular predetermined event of said group. And, placing said interrupt time range at the occurrence of the first particular event thus detected in the order of priority.
  • the subject of the invention is also a remote terminal for a wireless communication system, for example a cellular mobile telephone, comprising a reception chain, a transmission channel, a power amplification stage connected between the transmission chain and the antenna, and a processing stage adapted to adjust the output power of the amplification stage as a function of power information regularly received by the chain reception.
  • a wireless communication system for example a cellular mobile telephone
  • the power amplification stage comprises a variable gain amplification means capable of covering said power range.
  • the processing means are able to adjust the value of the gain and the supply voltage of the amplification means according to said power information.
  • the new value of the gain will be a function of the new output power value and it may be provided that the processing means furthermore comprise an array (memory) providing, for each value, transmission power, and gain, a value for the supply voltage of the amplification means.
  • variable gain amplification means is to use at least two individually selectable power amplifiers, capable of covering together the entire power range, respectively having different specific operating areas and a common area of operation.
  • the power amplification stage further comprises selection means able to respond to a selection information, to link the output of the transmission channel, to the input of the power amplifier corresponding to said selection information.
  • the processing stage includes a correspondence table associating one of the amplifiers at each point of the power range according to an allocation criterion, and control means capable in the presence of an information element. received power corresponding to a point of the common area, to check if this power information corresponds to the amplifier currently selected.
  • the processing stage further comprises control means capable, if this power information does not correspond to the currently selected amplifier, to deliver to the selection means the selection information corresponding to the power amplifier associated with this power information.
  • control means are also able to adjust the value of the supply voltage of the selected amplifier.
  • At least one of the amplifiers can be variable gain, the control means then being able to further adjust the value of the gain of the selected amplifier according to said power information.
  • control means are able in the presence of received power information corresponding to a point of the common area, to check if this power information corresponds to the amplifier currently selected, and in the contrary case to define a switching time range extending from the instant of reception of said power information over a predetermined time compatible with the limits of said common zone, and to define as a function of a predetermined transmission interruption criterion, the time limits of an interrupt time range being in said switching range.
  • control means are able to authorize the continuation, possibly from new received power information, of the adjustment of the transmission power with the currently selected amplifier until the occurrence of said range of power. interrupt, then, if the last power information received before the occurrence of said interrupt range still does not correspond to the currently selected amplifier, to inhibit transmission during said interrupt range, to issue to the means of selecting the selection information corresponding to the power amplifier associated with the last power information, and reactivating the transmission with the new selected amplifier.
  • the reference TP denotes a remote terminal, such as a cellular mobile telephone, which is in communication with a base station BS1, for example according to a communication scheme of the CDMA-FDD type.
  • the cellular mobile telephone conventionally comprises an ERF radio frequency analog stage connected to an ANT antenna via a DUP duplexer, for receiving an ISG input signal (FIG. 3).
  • the ERF stage comprises (FIG. 3) a low noise amplifier LNA and two processing channels comprising conventional mixers, filters and amplifiers (not shown in FIG. 2 for the purpose of simplification).
  • Both The mixers receive respectively from a PLL phase-locked loop two signals mutually having a phase difference of 90 °.
  • the two processing channels respectively define two flows I (direct flow) and Q (quadrature flow) according to a denomination well known to those skilled in the art.
  • the two I and Q streams are delivered to an ETNR receive processing stage.
  • This ETNR processing stage comprises, in a conventional manner, a receiver RR, commonly designated by those skilled in the art “receiver Rake”, followed by conventional MP demodulation means which demodulate the constellation delivered by the RR Rake receiver.
  • the transmission medium is in fact a multi-path transmission medium MPC, that is to say comprising several different transmission paths (three transmission paths P1, P2, P3 are shown in Figure 3).
  • MPC multi-path transmission medium
  • the ISG signal that is received by the mobile phone has different temporally delayed versions of the initially transmitted signal, which are the result of the multipath transmission characteristics of the transmission medium.
  • each path introduces a different delay.
  • the Rake RR receiver which equips a cellular mobile telephone operating in a CDMA communication system, is used to perform time alignment, descrambling, despreading and combination of the delayed versions of the initial signals, in order to deliver the data streams. information contained in the initial signals.
  • the received signal ISG could also result from the transmission of initial signals respectively transmitted by different BS1 and BS2 base stations.
  • the ETNR processing stage also conventionally comprises an SD source decoder which performs a source decoding well known to those skilled in the art.
  • the PLL phase locked loop is controlled by an automatic frequency control algorithm incorporated in a processor of the ETNR stage.
  • the initial signal containing the information is scrambled ("scrambled” in English) and spread (“ spreaded ”) by base station processing means, using the scrambling code of the base station and the orthogonal code (OVSF code) of the telephone TP.
  • the symbols are transformed into fragments ("chips" in English) having a predetermined length (for example equal to 260 ns), and corresponding to a predetermined fragment rate (chip rate) equal, for example, to 3.84 Mcps .
  • chip rate is greater than the symbol rate.
  • a symbol can be transformed into a number of fragments ranging from 4 to 256.
  • each TRR frame having a length of 10 ms, is subdivided into fifteen slots SL0-SL14, each interval having a length equal to 2560 fragments.
  • the information received by the telephone from the base station includes actual data carried on a DPDCH data channel, and control indications carried on a DPCCH control channel.
  • each time slot SLi of the TRR frame contains nested ( Figure 6) data and control indication. This is well known to those skilled in the art. Nevertheless, it can refer for more details to the technical specification 3G TS 25.211, published by the organization 3GPP, 650 Route des Lucioles - Sophia Antipolis-Valbonne-France, and entitled "3rd Generation Partnership Project" Technical Specification Group Radio Access Network: Physical Channels and Mapping of Transport to Physical Channels (FDD), (Release 1999).
  • TPC word Transmit power control
  • TPC word Transmit power control
  • the mobile phone TP to adjust the power transmission of the power amplifier stage, to comply with this power information, as will now be described in more detail.
  • the baseband processing block BB comprises an ETNE transmission processing stage. which performs, in a conventional manner, in particular the source coding, symbol spreading and modulation processes, for delivering the two I and Q flows to a CHM transmission channel of conventional structure.
  • This CHM transmission channel includes in particular, digital / analog converters head, as well as mixers for performing a frequency transposition at the transmission frequency.
  • the transposition signals are provided by a phase locked loop (not shown here for simplification purposes) also controlled by automatic frequency control means incorporated in the stage ETNE.
  • the power amplification stage of the mobile telephone TP here comprises a variable gain amplifier means MAGV whose input is connected to the output of the transmission channel CHM.
  • the output of the amplification means MAGV is connected to the AMT antenna via a duplexer DUP.
  • the amplification means MAGV is powered by an ALM supply, preferably a switching power supply, which delivers, in response to a control signal CTPAL delivered by the means ETNE, the supply voltage Valim of the amplification means MAGV, to from the battery voltage of the VBAT phone.
  • ALM supply preferably a switching power supply
  • the processing means ETNE deliver a gain control signal CTPG making it possible to adjust the value of the gain of the amplification means.
  • variable gain amplifier means MAGV is obtained by two fixed gain power amplifiers PA1 and PA2, will now be described. individually selectable.
  • Figure 2 there is shown by a single triangle, each power amplifier.
  • a power amplifier is provided by a preamplifier and a power stage.
  • the power amplification stage of the mobile telephone TP here comprises two power amplifiers PA1 and PA2, of conventional structure and known per se, the respective inputs of which are connected to the outputs of selection means MSW formed here by a duplexer controlled by a CTS selection signal developed and issued by the ETNE treatment stage.
  • the MSW duplexer input is connected to the output of the CHM transmission channel.
  • the respective outputs of the two amplifiers P1 and PA2 are connected to the antenna ANT via the duplexer DUP.
  • each amplifier PA1, PA2 is controlled by a control signal CTPA1, CTPA2 to inhibit its operation.
  • CTPA 1 and CTPA 2 are also delivered by the processing stage ETNE.
  • each power amplifier has a specific operating area and a common operating area with the other power amplifier.
  • the amplifier PA1 has a specific operating zone ZFO1, for which the efficiency (output) of the amplifier increases from a value EF1 to a value EFM1, for example in a zone of power between VP0 dBm and Pmax. For powers below VP0 dBm the efficiency of the PAI amplifier decreases from the value EF1
  • the specific operating zone ZFO2 of amplifier PA2 extends from Pmin to VP11 dBm.
  • the efficiency of the amplifier PA2 then continues to increase to reach the value EFM2 at VP0 dBm.
  • the two power amplifiers together cover the entire power range, ranging from Pmin to Pmax. They have different fixed earnings.
  • Each point of the power range is associated with one of the amplifiers according to an allocation criterion which takes into account the efficiency in combination with the need for amplifier switching under conditions suitable for the transmission of the amplifiers. data.
  • all operating points between Pmin and VP11 dBm are associated with the PA2 amplifier.
  • all operating points between VP0 dBm and Pmax are associated with amplifier PA1.
  • This correspondence table between an operating point and a power amplifier is stored in a memory MM of the stage ETNE (FIG. 5).
  • stage ETNE also comprises MCT control means and MCD control means. These means are for example made in software in a microprocessor.
  • the power information TPC (FIG. 6) is received within each time slot SLi, and the power variation between two successive power information is, for example, 1 dBm. As long as the TPC power information received by the processing stage ETNE is in the specific operating area of the amplifier PA1 (assumed here selected) and outside the common operating zone ZFC there is no need to change the power amplifier and the transmit power can continue to be adjusted with the TPC information using the selected amplifier PA1.
  • control means When the power demanded by the network decreases and corresponds to an operating point located in the common operating zone ZFC, the control means will, in a general manner, check whether this received power information TPCi (step 90, FIG. ) corresponds to the currently selected amplifier (step 91), that is to the amplifier PA1. If this is the case, there is no change in the selection of the power amplifier. This is the case, for example, for operating points PF0 to PF5.
  • step 90 if a power information TPCi received in step 90 (FIG. 10) corresponds to the operating point PF6, it is then necessary to switch the power amplifier and to select the amplifier PA2.
  • the MCT control means will then define a PCM switching time range (step 92) extending from the instant of reception of said power information TPCi (corresponding to the operating point PF6), over a predetermined duration. compatible with the boundaries of said ZFC common area.
  • the MCT control means will also define according to a predetermined criterion of CRF transmission interruption, the content of which will be discussed in more detail below, the time limits of a PIT interrupt time range lying in said PCM switching range.
  • control means will define, from the point PF5, a switching range within which it will be possible to change the power amplifier while continuing, before this switching point, to adjust the transmit power using the currently selected amplifier, i.e. the amplifier PA1, although this has a lower efficiency than that of the amplifier PA2.
  • the limit of the switching range will for example be that defined by point PF10. Indeed, between points PF6 and PF10, the efficiency of amplifier PA1 remains acceptable, while beyond point PF10 it is considered too low.
  • intervals intervals
  • control means will check if this information received TPCi power (step 90, Figure 10) corresponds to the currently selected amplifier (step 91), that is to say the amplifier PA2. If this is the case, there is no change in the selection of the power amplifier. This is the case, for example, for operating points P11 to P6.
  • the MCT control means will define the PCM switching time range (step 92) extending from the instant of reception of said power information TPCi (corresponding to the operating point P5), over a predetermined predetermined period of time. with the boundaries of said ZFC common area.
  • the MCT control means will also define according to the predetermined CRF transmission interruption criterion, the time limits of the interrupt time range PIT being in said PCM switching range.
  • control means will define, from the point P5, a switching range within which it will be possible to change the power amplifier while continuing, before this switching point, 'adjust the transmit power using the currently selected amplifier, ie the amplifier PA2.
  • the limit of the switching range will be here for example that defined by the point P1.
  • control means will define, as a function of the transmission interruption criterion, the interrupt time range PIT which will correspond to the best times for changing the amplifier, this change requiring a prior stop the transmission of the phone.
  • the control means will detect in step 93 the occurrence of the interrupt range PIT. As long as this interruption range is not reached, the control means will allow the continuation (step 95) of the adjustment of the transmission power with the amplifier currently selected, that is to say here amplifier PA1, and this possibly from new TPC power information received.
  • the interrupt time range PIT should occur at a time corresponding to an operating point located between the points PF7 and PF8, the transmission power will continue to be adjusted until occurrence of this PIT interrupt range using the TPC information corresponding to points PF6 and PF7 (steps 96 and 97).
  • the control means each time a new power information TPCi + 1 is received, the control means check whether the new received power information corresponds to the currently selected amplifier, ie the amplifier PA1 (step 97). If this were the case (for example if the power information received immediately after that associated with point PF6 corresponds to operating point PF5), there is no longer any need to change the power amplifier and the power amplifier currently selected PA1 is kept selected (step 98).
  • control means When the control means detect the occurrence of the interruption time range, they then initiate the switching process (step 94) illustrated in FIG. 11.
  • control means will inhibit the transmission (I, Q) during the entire duration of the interrupt range PIT. Then, they will deliver to the selection means MSW, the selection information CTS corresponding to the power amplifier associated with the last received power information, then they will reactivate the transmission with the new selected amplifier.
  • control signal CTPA1 of the amplifier PA1 is first set to 0 (amplifier PA1 deactivated) once the transmission has been inhibited. Then, the selection signal CTS is supplied to the selection means MSW, which then connect the output of the transmission channel CHM to the input of the amplifier PA2.
  • control signal CTPA2 is set to 1, thereby activating the operation of the amplifier PA2. Then, when this amplifier PA2 is activated, the control means reactivate the I, Q emission.
  • This temporal timing is possibly reproduced later in the course of another PIT2 interrupt time range in the case where it is advisable to recommence on the amplifier PA1.
  • the duration of the PIT interruption time range is also chosen so as to minimize the risk of disturbances of the transmission while allowing efficient and clear switching of the amplifiers.
  • a duration of the order of a few fragments for example two to four fragments, which corresponds to a duration of up to about a microsecond.
  • the CRF transmission interruption criterion comprises the choice of at least one predetermined particular event that may occur during a transmission and having a predetermined impact on the bit error rate in the event of a transmission. transmission interruption when this particular event occurs.
  • a particular event will preferably be chosen which minimizes the bit error rate in the event of transmission interruption at the occurrence of this particular event.
  • the control means then place said PIT interrupt time range at the occurrence of that particular event.
  • the emission interruption criterion advantageously comprises the choice of a group of several predetermined particular events that may occur during a transmission, and the scheduling of these events. particular in a predetermined order of priority according to their respective impacts on the bit error rate in the event of a transmission interruption at the occurrence of these particular events.
  • the particular event having the highest priority will result in the lowest bit error rate in the event of a transmission interruption at the occurrence of that particular highest priority event.
  • the particular event with the lowest priority will lead to a higher bit error rate.
  • the control means will then analyze the characteristics of the transmission by considering said priority order, so as to detect the possible presence during said PCM switching range of a particular predetermined event of said group. And, the control means will then place said interrupt time range PIT during the occurrence of the first particular event thus detected in the order of priority.
  • FIGS. 6 to 8 illustrate the particular events making it possible to define said interrupt time range PIT.
  • FIG. 6 schematically illustrates a transmission frame TRE within which information originating from the telephone to the base station (upstream: "Uplink") is sent in a normal operating mode. More precisely, in a manner analogous to the reception frame TRR (FIG. 5), the transmission frame TRE is also subdivided into fifteen slots SLi. Within each slot Sli are conveyed in parallel the DPDCH data channel and the DPCCH control channel. More specifically, the control indications conveyed comprise a PLT word relating to a pilot signal, a TFCI word corresponding to a transport format combination indicator, an FBI word corresponding to a feedback information item and a TPC word corresponding to information from power emitted. Those skilled in the art will also be able to refer to the aforementioned 3G TS 25.211 specification for more details concerning the structure of a transmission frame TRE.
  • the data contained in the DPDCH data channel can be spread with a variable spreading factor.
  • This spreading factor can thus vary from 4 to 256 depending on the quality of service required.
  • the transmitted information can be transmitted within a "compressed mode" ("compressed mode").
  • compressed mode there are provided, as schematically illustrated in FIG. 7, empty intervals TGP separating transmission intervals SLj and SLk and during which no information is transmitted.
  • TGP empty intervals
  • the mobile phone may also, under certain circumstances, interact with the base station in a "gated mode"("gatedmode”) transmission mode.
  • "gatedmode" "gatedmode”
  • the transmission must be interrupted during certain intervals of each frame. The number of intervals during which the transmission is to be interrupted, as well as their position in the frame, depends on the rate of hashing.
  • Such a mode of chopped emission is also known to those skilled in the art. For more details, it can nevertheless refer to the 3G TR 25.840 specification of the aforementioned organization (3GPP).
  • the mobile phone can also interact with the base station in a discontinuous transmission mode ("DTX mode" in English).
  • DTX mode discontinuous transmission mode
  • Such a mode of transmission is also well known to those skilled in the art.
  • INS silence intervals during which no data is transmitted on the DPDCH data channel towards the base station.
  • the DPCCH control channel continues to be transmitted and may notably comprise the words FBI and TFCI.
  • control means will first detect whether the switching range PCM will contain at least one empty interval TGP in compressed transmission mode. If this is the case, the control means will place the transmission interrupt range PIT in this empty interval.
  • control means will detect the possible presence of a chopped emission mode and will then place the transmission interruption range PIT in one of the intervals during which the transmission can be interrupted.
  • control means will detect the possible presence of a discontinuous transmission mode and will then place the PIT transmission interruption range during a P1INS or P2INS part (FIG. 8). .
  • control means will then detect the possible presence of portions of intervals during which the data is transmitted with a high spreading factor, but in which no feedback is transmitted. FBI, nor TFCI transport format combination indicators. If this detection is positive, the control means will place the transmission interruption range during these interval portions.
  • control means will try to detect portions of intervals during which data is transmitted having a low spreading factor, but in which no FBI feedback is still issued. nor TFCI transport format combination indicators. The control means will then place the PIT transmission interruption range during these interval portions.
  • control means will then place the interruption range of PIT transmission in the portions of the intervals at which FBI feedback information or TFCI transport format combination indicators are issued.
  • the MCD control means of the stage ETNE go from the contents of the memory MM1 supply the switching power supply ALM with the signal CTPAL so as to adjust the supply voltage Valim of the selected amplifier.
  • the two amplifiers PA1 and PA2 are this time variable gain.
  • the principle of selection and switching of these two amplifiers is identical to that which has just been described with reference to the preceding figures.
  • the control means MCD furthermore delivers the gain control signal CTPG1 (for the amplifier PA1) or CTPG2 (for the amplifier PA2) to the selected amplifier.
  • control means MCLD always supply the switching power supply with the corresponding control signal so as to adjust the supply voltage of the selected amplifier. to minimize the back-off of this amplifier.
  • the invention is not limited to the embodiments and implementations which have just been described but embraces all the variants. Thus, it is particularly advantageous to also control the accuracy of the output power.
  • an MCPS control block receiving on the one hand, the level of the output power delivered by the MAGV amplifier and, on the other hand, the CTPG control signal originating from the power setpoint received by the terminal, and delivering, after comparison of the two inputs, the control signal the gain of the MAGV amplifier.
  • control block can also be envisaged in the embodiments illustrated in FIGS. 2 and 12.
  • the gain control signal would then be delivered for example to a preamplifier. variable gain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
EP01107740A 2001-04-02 2001-04-02 Procede de contrôle de la puissance d'émission Expired - Lifetime EP1248384B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01107740A EP1248384B1 (fr) 2001-04-02 2001-04-02 Procede de contrôle de la puissance d'émission
DE60130099T DE60130099T2 (de) 2001-04-02 2001-04-02 Verfahren zur Sendeleistungsregelung
JP2002071440A JP2002330079A (ja) 2001-04-02 2002-03-15 送信電力を所定電力範囲において監視するリモート端末およびその方法
US10/113,958 US7096035B2 (en) 2001-04-02 2002-04-01 Process and device for monitoring the transmission power of a mobile terminal, for example a cellular mobile telephone, in particular capable of operating according to the UMTS standard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01107740A EP1248384B1 (fr) 2001-04-02 2001-04-02 Procede de contrôle de la puissance d'émission

Publications (2)

Publication Number Publication Date
EP1248384A1 EP1248384A1 (fr) 2002-10-09
EP1248384B1 true EP1248384B1 (fr) 2007-08-22

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EP01107740A Expired - Lifetime EP1248384B1 (fr) 2001-04-02 2001-04-02 Procede de contrôle de la puissance d'émission

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US (1) US7096035B2 (zh)
EP (1) EP1248384B1 (zh)
JP (1) JP2002330079A (zh)
DE (1) DE60130099T2 (zh)

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US20040203984A1 (en) * 2002-06-11 2004-10-14 Tai-Her Yang Wireless information device with its transmission power lever adjustable
CN1324858C (zh) * 2003-01-13 2007-07-04 三星电子株式会社 利用节能轮询表来减少功耗的设备和方法
US8094554B2 (en) 2006-10-26 2012-01-10 Qualcomm Incorporated Compressed mode operation and power control with discontinuous transmission and/or reception
US7715865B2 (en) * 2006-12-21 2010-05-11 Sony Ericsson Mobile Communications Ab Compressed mode for reducing power consumption
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JP5603647B2 (ja) * 2009-05-13 2014-10-08 キヤノン株式会社 給電装置、給電装置の制御方法及び給電通信システム
JP5597022B2 (ja) 2009-05-13 2014-10-01 キヤノン株式会社 給電装置、及び制御方法
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Also Published As

Publication number Publication date
DE60130099D1 (de) 2007-10-04
JP2002330079A (ja) 2002-11-15
EP1248384A1 (fr) 2002-10-09
DE60130099T2 (de) 2008-05-15
US7096035B2 (en) 2006-08-22
US20020176513A1 (en) 2002-11-28

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